Calcium oxalate crystals of some Crataegus (Rosaceae) species growing in Aegean region

Abstract

In this study, Ca oxalate crystals were isolated from the leaves and X-ray diffraction identified them as weddelite in Crataegus pontica C. Koch, C. stevenii Polar., C. monogyna ssp. monogyna Jacq. in C. orientalis var. orientalis Pallas ex Bieb. both whewellite and weddelite crystals were found. Although there were some differences among the soluble and insoluble oxalate contents, they were not notable in the species of C. stevenii (10%; 18%), C. orientalis (12.4%; 15%), C. monogyna (12.9%; 13%), whereas in C. pontica the difference was so great with the lowest soluble (4%), and highest (28%) insoluble oxalate content. Crystals have tetragonal or prismatic shape in general but tetrahedral kinked and straight shapes were seen in C. orientalis, tetragonal aggregates in C. stevenii, and also pseudo-tetrahedral cordate (heart) shape were found in C. monogyna ssp. monogyna and C. pontica. As the crystal biomineralization is under genetic control, this characteristic hydration state of crystals of Crataegus orientalis var. orientalis must be important for systematic phylogenetics.

The Occurrence of Calcium Oxalate Crystals and Distribution of Arabinogalactan Proteins (AGPs) in Ovary Cells During Fragaria x ananassa (Duch.) Development

“…In Rosaceae family, crystals have been observed only in the leaf of Crataegus (Demiray 2007) and Prunus virginiana (Lersten and Horner 2004). In this study, crystals were observed in the ovary wall of F. x ananassa.…”

Morphological Changes and Function of Calcium Oxalate Crystals in Eddo Roots in Hydroponic Solution Containing Calcium at Various Concentrations

“…The crystal occurs in different plant tissues, including leaves, stems, roots, seeds and flora of over 215 plant families (Franceschi and Horner, 1980;Lersten and Horner, 2000;Monje and Baran, 2002;Franceschi and Nakata, 2005;Korth et al, 2006;Demiray, 2007). The crystals are formed in calcium oxalate crystal idioblasts.…”

Leaf anatomical traits of Crataegus orientalis Pall. ex M.Bieb. (Rosaceae) from Turkey

“…& Kit. ex Willd., while both tetragonal and prismatic crystals were reported for C. orientalis [34]. Furthermore, calcium oxalate crystals were also found in different parts of the leaf lamina in the genus Rosa L. [35] and Rosaceae family [25,[36][37][38].…”